/*
 * Copyright (C) 2011 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.api.gwt.oauth2.client;

import com.google.gwt.storage.client.Storage;

/**
 * Default implementation of token storage, using localStorage to store tokens
 * (if supported).
 *
 * @author jasonhall@google.com (Jason Hall)
 */
class TokenStoreImpl implements TokenStore {
  private static final Storage STORAGE = Storage.getLocalStorageIfSupported();

  // Make sure that the Storage we have isn't null.
  static {
    if (STORAGE == null) {
      throw new NullPointerException("Storage is null");
    }
  }

  public void set(String key, String value) {
    STORAGE.setItem(key, value);
  }

  public String get(String key) {
    return STORAGE.getItem(key);
  }

  public void clear() {
    STORAGE.clear();
  }
}
